Hexagon Head - For Light Steel 1.2-3.5mm - Part Thread - Self Drilling Screws

Hexagon head screws with self-drilling point and bonded EPDM 

washer for fixing composite roofing and cladding panels to steel 

purlins. Also commonly used for fixing brick-tie channels through 

composite panels. Coarse thread and TEK 3 point suitable for steel 

thicknesses from 1.2 – 3.5mm. High threads situated under the head 

for supporting the top sheet of the panel. Tough three-stage zinc-ceramic coating for superior corrosion resistance. 

Installation

1. Screws should be installed using a Tek screwdriver or cordless 

drill with adequate power and a drilling speed of between 1500 

– 2500 rpm. (IMPORTANT - Impact screwdrivers will damage 

the threads and must not be used)

2. Use a 5/16" socket to install the screw perpendicularly into the 

steel maintaining steady pressure without forcing the tool. 

3. Stop inserting the screw as soon as the compression disc of the 

bonded washer changes from convex to flat. Overtightening the 

screw is liable to damage the thread particularly in thin steel.